If after checking hoses for kinks & cleaning the filters you still have a slow fill, change the inlet valve for a new one.
Lincoln Appliance NZ, November 2008
Check for kinks in the water hoses - if they're ok turn off the hose taps, remove hoses and check the plastic filters in the valve inlet connection. You will need a pair of thin pliers to grip the filter tab and pull it out. Clean any debris off with a toothbrush, rinse and reinstall in valve.
Repair and service your own washing machine. Go to www.2ndwave.co.uk/manual.html